.bkbg-hrc-app{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;-webkit-font-smoothing:antialiased}.bkbg-hrc-card{margin:0 auto;padding:36px 32px;box-shadow:0 4px 32px rgb(0 0 0 / .08);border-radius:16px}.bkbg-hrc-card h2.bkbg-hrc-title{text-align:center;font-family:var(--bkbg-hrc-tt-font-family,inherit);font-size:var(--bkbg-hrc-tt-font-size-d,28px);font-weight:var(--bkbg-hrc-tt-font-weight,800);line-height:var(--bkbg-hrc-tt-line-height-d,1.2);font-style:var(--bkbg-hrc-tt-font-style,normal);text-transform:var(--bkbg-hrc-tt-text-transform,none);text-decoration:var(--bkbg-hrc-tt-text-decoration,none);letter-spacing:var(--bkbg-hrc-tt-letter-spacing-d);word-spacing:var(--bkbg-hrc-tt-word-spacing-d);margin:0 0 8px}.bkbg-hrc-subtitle{text-align:center;font-family:var(--bkbg-hrc-st-font-family,inherit);font-size:var(--bkbg-hrc-st-font-size-d,15px);font-weight:var(--bkbg-hrc-st-font-weight,400);line-height:var(--bkbg-hrc-st-line-height-d,1.5);font-style:var(--bkbg-hrc-st-font-style,normal);text-transform:var(--bkbg-hrc-st-text-transform,none);text-decoration:var(--bkbg-hrc-st-text-decoration,none);letter-spacing:var(--bkbg-hrc-st-letter-spacing-d);word-spacing:var(--bkbg-hrc-st-word-spacing-d);margin:0 0 28px}.bkbg-hrc-controls{display:flex;gap:20px;padding:20px 24px;border-radius:12px;margin-bottom:24px;flex-wrap:wrap}.bkbg-hrc-control-group{flex:1;min-width:200px;display:flex;flex-direction:column;gap:10px}.bkbg-hrc-label{font-size:14px;font-weight:700}.bkbg-hrc-slider{width:100%;height:6px;border-radius:3px;cursor:pointer;-webkit-appearance:none;appearance:none;background:#e5e7eb;outline:none}.bkbg-hrc-slider::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;border-radius:50%;background:currentColor;cursor:pointer;border:3px solid #fff;box-shadow:0 0 0 2px currentColor,0 2px 8px rgb(0 0 0 / .15)}.bkbg-hrc-select{width:100%;padding:10px 14px;font-size:14px;border:1.5px solid #e5e7eb;border-radius:8px;cursor:pointer;outline:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%236b7280' d='M6 8L0 0h12z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:32px}.bkbg-hrc-maxhr{text-align:center;border:2px solid;border-radius:14px;padding:24px;margin-bottom:28px}.bkbg-hrc-maxhr-label{font-size:14px;font-weight:700;margin-bottom:8px;text-transform:uppercase;letter-spacing:.04em}.bkbg-hrc-maxhr-val{font-size:72px;font-weight:900;line-height:1;margin-bottom:4px}.bkbg-hrc-maxhr-unit{font-size:14px;font-weight:600}.bkbg-hrc-zones{display:flex;flex-direction:column;gap:10px}.bkbg-hrc-zone-row{display:flex;align-items:center;gap:14px;border-radius:10px;padding:14px 18px;border-left-width:6px;border-left-style:solid;transition:transform 0.12s}.bkbg-hrc-zone-row:hover{transform:translateX(3px)}.bkbg-hrc-zone-left{display:flex;flex-direction:column;align-items:center;gap:5px;min-width:88px}.bkbg-hrc-zone-badge{font-size:12px;font-weight:800;padding:4px 10px;border-radius:99px;white-space:nowrap;text-transform:uppercase;letter-spacing:.04em}.bkbg-hrc-zone-name{font-size:13px;font-weight:700;color:#374151;text-align:center}.bkbg-hrc-zone-center{flex:1;padding:0 8px}.bkbg-hrc-zone-purpose{font-size:13px;color:#6b7280;line-height:1.4}.bkbg-hrc-zone-right{text-align:right;min-width:100px}.bkbg-hrc-zone-bpm{font-size:20px;font-weight:800;line-height:1;margin-bottom:3px}.bkbg-hrc-zone-pct{font-size:11px;color:#9ca3af;font-weight:600}@media (max-width:540px){.bkbg-hrc-card{padding:24px 14px}.bkbg-hrc-maxhr-val{font-size:52px}.bkbg-hrc-zone-row{flex-wrap:wrap}.bkbg-hrc-zone-left{flex-direction:row;min-width:auto}.bkbg-hrc-zone-right{text-align:left;min-width:auto}}@media (max-width:1024px){.bkbg-hrc-card h2.bkbg-hrc-title{font-size:var(--bkbg-hrc-tt-font-size-t,var(--bkbg-hrc-tt-font-size-d,28px));line-height:var(--bkbg-hrc-tt-line-height-t,var(--bkbg-hrc-tt-line-height-d,1.2));letter-spacing:var(--bkbg-hrc-tt-letter-spacing-t,var(--bkbg-hrc-tt-letter-spacing-d));word-spacing:var(--bkbg-hrc-tt-word-spacing-t,var(--bkbg-hrc-tt-word-spacing-d))}.bkbg-hrc-subtitle{font-size:var(--bkbg-hrc-st-font-size-t,var(--bkbg-hrc-st-font-size-d,15px));line-height:var(--bkbg-hrc-st-line-height-t,var(--bkbg-hrc-st-line-height-d,1.5));letter-spacing:var(--bkbg-hrc-st-letter-spacing-t,var(--bkbg-hrc-st-letter-spacing-d));word-spacing:var(--bkbg-hrc-st-word-spacing-t,var(--bkbg-hrc-st-word-spacing-d))}}@media (max-width:767px){.bkbg-hrc-card h2.bkbg-hrc-title{font-size:var(--bkbg-hrc-tt-font-size-m,var(--bkbg-hrc-tt-font-size-t,var(--bkbg-hrc-tt-font-size-d,28px)));line-height:var(--bkbg-hrc-tt-line-height-m,var(--bkbg-hrc-tt-line-height-t,var(--bkbg-hrc-tt-line-height-d,1.2)));letter-spacing:var(--bkbg-hrc-tt-letter-spacing-m,var(--bkbg-hrc-tt-letter-spacing-t,var(--bkbg-hrc-tt-letter-spacing-d)));word-spacing:var(--bkbg-hrc-tt-word-spacing-m,var(--bkbg-hrc-tt-word-spacing-t,var(--bkbg-hrc-tt-word-spacing-d)))}.bkbg-hrc-subtitle{font-size:var(--bkbg-hrc-st-font-size-m,var(--bkbg-hrc-st-font-size-t,var(--bkbg-hrc-st-font-size-d,15px)));line-height:var(--bkbg-hrc-st-line-height-m,var(--bkbg-hrc-st-line-height-t,var(--bkbg-hrc-st-line-height-d,1.5)));letter-spacing:var(--bkbg-hrc-st-letter-spacing-m,var(--bkbg-hrc-st-letter-spacing-t,var(--bkbg-hrc-st-letter-spacing-d)));word-spacing:var(--bkbg-hrc-st-word-spacing-m,var(--bkbg-hrc-st-word-spacing-t,var(--bkbg-hrc-st-word-spacing-d)))}}